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changed from using input fields for keys to getting from url (#17) 

* changed from using input fields for keys to getting from url

* cleaned
This commit is contained in:
Abhinav Adduri 2017-05-30 14:45:15 -07:00 committed by Danny Coates
parent a45bcf3d35
commit 7b841e9498
3 changed files with 53 additions and 73 deletions
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9
app.js
View File

@ -29,7 +29,6 @@ app.get('/assets/download/:id', function(req, res) {
res.send('error');
} else {
res.setHeader('Content-Disposition', 'attachment; filename=' + reply);
// res.setHeader('Content-Transfer-Encoding', 'binary');
res.setHeader('Content-Type', 'application/octet-stream');
res.download(__dirname + '/static/' + reply);
@ -38,7 +37,7 @@ app.get('/assets/download/:id', function(req, res) {
});
app.route('/upload')
app.route('/upload/:id')
.post(function (req, res, next) {
var fstream;
@ -50,11 +49,11 @@ app.route('/upload')
fstream = fs.createWriteStream(__dirname + '/static/' + filename);
file.pipe(fstream);
fstream.on('close', function () {
let id = Math.floor(Math.random()*10000).toString();
let id = req.params.id;
client.hset(id, "filename", filename, redis.print);
client.hset(id, "expiration", 0, redis.print);
console.log("Upload Finished of " + filename);
res.send(id); //where to go next
res.send(id);
});
});
});
@ -62,6 +61,6 @@ app.route('/upload')
app.listen(3000, function () {
console.log('Example app listening on port 3000!')
console.log('Portal app listening on port 3000!')
})

6
public/download.html
View File

@ -3,16 +3,10 @@
<head>
<title>Page Title</title>
<script type="text/javascript" src="/file.js"></script>
</head>
<body>
<input id="keyhash" placeholder="Paste the key your friend sent you."/><br />
<input id="salt" placeholder="Paste the salt your friend sent you."/><br />
<button onclick="download()">DOWNLOAD</button>
</body>
</html>

107
public/file.js
View File

@ -1,11 +1,8 @@
function download() {
var xhr = new XMLHttpRequest();
xhr.open('get', '/assets' + location.pathname, true);
xhr.open('get', '/assets' + location.pathname.slice(0, -1), true);
xhr.responseType = 'blob';
// $.each(SERVER.authorization(), function(k, v) {
// xhr.setRequestHeader(k, v);
// });
// xhr.setRequestHeader('Content-type', 'application/json; charset=utf-8');
xhr.onload = function(e) {
if (this.status == 200) {
@ -15,36 +12,33 @@ function download() {
var fileReader = new FileReader();
fileReader.onload = function() {
arrayBuffer = this.result;
// console.log(arrayBuffer);
var array = new Uint8Array(arrayBuffer);
salt = new Uint8Array(JSON.parse(document.getElementById('salt').value));
salt = strToIv(location.pathname.slice(10, -1));
window.crypto.subtle.importKey(
"jwk", //can be "jwk" or "raw"
{ //this is an example jwk key, "raw" would be an ArrayBuffer
"jwk",
{
kty: "oct",
k: document.getElementById('keyhash').value,
k: location.hash.slice(1),
alg: "A128CBC",
ext: true,
},
{ //this is the algorithm options
{
name: "AES-CBC",
},
true, //whether the key is extractable (i.e. can be used in exportKey)
["encrypt", "decrypt"] //can be "encrypt", "decrypt", "wrapKey", or "unwrapKey"
true,
["encrypt", "decrypt"]
)
.then(function(key){
//returns the symmetric key
window.crypto.subtle.decrypt(
{
name: "AES-CBC",
iv: salt, //The initialization vector you used to encrypt
iv: salt,
},
key, //from generateKey or importKey above
array //ArrayBuffer of the data
key,
array
)
.then(function(decrypted){
//returns an ArrayBuffer containing the decrypted data
// let original = new Uint8Array(decrypted);
var dataView = new DataView(decrypted);
var blob = new Blob([dataView]);
var downloadUrl = URL.createObjectURL(blob);
@ -57,20 +51,12 @@ function download() {
.catch(function(err){
console.error(err);
});
// console.log(key);
})
.catch(function(err){
console.error(err);
});
};
fileReader.readAsArrayBuffer(blob);
// console.log(blob);
// var downloadUrl = URL.createObjectURL(blob);
// var a = document.createElement("a");
// a.href = downloadUrl;
// // a.download = "feheroes.png";
// document.body.appendChild(a);
// a.click();
} else {
alert('Unable to download excel.')
}
@ -82,50 +68,44 @@ function onChange(event) {
var file = event.target.files[0];
var reader = new FileReader();
reader.onload = function(event) {
// The file's text will be printed here
let self = this;
window.crypto.subtle.generateKey({
name: "AES-CBC",
length: 128
},
true, //whether the key is extractable (i.e. can be used in exportKey)
true,
["encrypt", "decrypt"])
.then(function(key){
//returns a key object
var arrayBuffer = self.result;
var array = new Uint8Array(arrayBuffer);
// binaryString = String.fromCharCode.apply(null, array);
// console.log(binaryString);
// console.log(file);
var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
window.crypto.subtle.encrypt({
name: "AES-CBC",
//Don't re-use initialization vectors!
//Always generate a new iv every time your encrypt!
iv: random_iv },
key, //from generateKey or importKey above
array //ArrayBuffer of data you want to encrypt
)
key,
array)
.then(function(encrypted){
console.log('Send this salt to a friend: [' + random_iv.toString() + ']');
// console.log(arrayBuffer);
//returns an ArrayBuffer containing the encrypted data
var dataView = new DataView(encrypted);
var blob = new Blob([dataView], { type: file.type });
window.data = encrypted;
var fd = new FormData();
fd.append('fname', file.name);
fd.append('data', blob, file.name);
// console.log(blob);
var xhr = new XMLHttpRequest();
xhr.open('post', '/upload', true);
var xhr = new XMLHttpRequest();
var hex = ivToStr(random_iv);
xhr.open('post', '/upload/' + hex, true);
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
console.log('Go to this URL: http://localhost:3000/download/'+xhr.responseText);
window.crypto.subtle.exportKey("jwk", key).then(function(keydata){
console.log('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
alert('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
})
}
};
@ -135,26 +115,33 @@ function onChange(event) {
console.error(err);
});
window.crypto.subtle.exportKey(
"jwk", //can be "jwk" or "raw"
key)
.then(function(keydata){
//returns the exported key data
console.log('Send this key to a friend: ' + keydata.k);
})
.catch(function(err){
console.error(err);
});
})
.catch(function(err){
console.error(err);
});
};
reader.readAsArrayBuffer(file);
}
function ivToStr(iv) {
let hexStr = '';
for (var i in iv) {
if (iv[i] < 16) {
hexStr += '0' + iv[i].toString(16);
} else {
hexStr += iv[i].toString(16);
}
}
window.hexStr = hexStr;
return hexStr;
}
function strToIv(str) {
var iv = new Uint8Array(16);
for (var i = 0; i < str.length; i += 2) {
iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
}
return iv;
}